Bottle cap



FIG. 1 is a perspective view of a bottle cap embodying our new design;

FIG. 2 is a top view thereof;

FIG. 3 is a side view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof; and,

FIG. 6 is the opposite side view thereof.

The bottom of the bottle cap forms no part of the claimed design. 

The ornamental design for a bottle cap, as shown and described. 